Fluid-operated stop-valve and alarm.



UNTTED YSTATES PATENT OFFICE,

BENGT M. XV. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR` TO PRATT da WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, .A CORPORATION OF NEW JERSEY.

FLUID-O PERATED STO P-VALVE AN D ALARM SPECIFICATION formingpart of Letters Patent No. 711,398, dated October 14, 1902. Application filed October 23, 1901. Serial No. 79,666. (No model.)

To all whom t may concern: the valve is connected with its associated ap- 5o Be it known that l, BENGT M. W. HANsoN, paratus to which the pressure is to be supa citizen of Sweden, and a resident of Hartplied. The inlet 85 from the pipe 47 is prefford, in the county of Hartford and State of erably cylindrical and contains the cylindrical 5 Connecticut, have invented certain new and valve-piston 88, which is shown in Figs. 5 and useful Improvementsin Fluid-Operated Stop- 6. That valve is fitted to slide longitudinally 5 5 Valves and Alarms, of which the following is to the extent represented by comparison of a specification. Figs. 3 and 4, its limit of movement being de` This invention is an improved stop-valve termined by a stop-screw 89 or in any other ro and alarm adapted to be operated automatconvenient way, which may also serve, as ically by the duid-pressure Which it controls, herein shown, to prevent the cylindrical valve 6o the object being to provide a simple, compact, from turning around. The valve is provided and inexpensive device for automatically with the longitudinal passage 91, leading stopping the flow of that pressure at the defrom the inlet S5 to the transverse port 92,

x 5 sired time and to sound an alarm to notify which when the valve is in the position shown the attendant or operator of the stopping of in Fig. 3 coincides with the `outlet-port 93, 65 the flow and the consequent stopping of the which preferably extends, as herein shown, machine or apparatus which had been opersubstantially at right angles to the direction ated by the pressure. of movement of the valve. The transverse 2o The construction, arrangement, and operaport 92 opens with equal area upon l[he oppotion of my preferred embodiment of this site sides of the interior wall of the cylin- 7o invention is illustrated in the accompanying drical valve, so that the transverse pressure drawings, in whichis taken by those walls, and therefore does Figure l is an end View, and Fig. 2 a front not react upon the valve so as-to interfere in 25 View, showing the exterior appearance of the the slightest degree with its sliding movevalve and its casing. Fig. 3 is a front view ment;` but the upward longitudinal pressure 75 showing the valve in its casing in section, against the lower end of the valve is not baltaken along the line 3 4 of Fig. l, the valve anced by any counteracting downward presbeing latched in its open position for permitsure, so that the constant tendency of the 3o ting the flow oi.' the pressure. Fig. 4 is a pressure is to force that pressure upwardly View similar to that of Fig. 3, excepting that to the position shown in Fig. 4, and in order 8o the valve is therein moved to its closed posito retain the valve in its lower position (shown tion, as permitted by the withdrawal of the in Fig. 3) a latch 95 is provided. That latch latch. In this view also the upper or alarm is pivotally mounted on the casing 48 and is 3 5 portion of the device is shown in longitudinal pressed by means of a spring 96 into engagesection to illustrate the manner in which the ment with a shoulder 97 appurtenant to the 85 exhaust-pressure makes its exit through and valve. 'Therefore when it is desired to stop sounds the alarm whistle or reed. Fig. 5 is the flow of pressureit isonlynecessaryto push a plan View, and Fig. 6 a side view, of the the latch aside, as shown in Fig. 4, when the 4o piston-valve of Figs. 3 and 4, Fig. 6 being in upward pressure from the inlet 85 will move section taken along the line 6 6 of Fig. 5. the valve promptly toits closedposition shown 9o The valve as herein shown is mounted in a in. the latter gure. The stop-valve is also casing 4S, which may be integral with the provided with a lateral inlet 99, which is conmachine or apparatus with which it is to be nected, by means of the duct 100, with a de- 45 employed or may be removably attached vice capable of beingsounded by the exhaustthereto. The lower end 83 of the casing is pressure through the said duct. In the presd 95 threaded or otherwise adapted to receive the ent instance this sounding device is representsupply-pipe 47, and the extension or nipple ed as being a reed or whistle 101, which is S4 is adapted to receive the piping by which screwed into the top of the valve and is provided with a knob or button 102, by means of which the operator may push down the valve to start the machine into operation. In the device as herein illustrated this Whistle portion is also provided With the shoulder 97 for engaging with the latch 95. By this arrangement the pressure contained in the pipes and passages beyond the stop-valve Will when the stop-valve is moved to the position shown in Fig. 4 return through the inlet 99 and the duct 100 and escape into the atmosphere through the reed or Whistle, sounding that Whistle until the pressure exhausts itself, thus serving as an alarm or notification to the attendant that the machine has stopped.

The machine may be stopped at any time at the Will of the operator by merely pushing the latch 95 aside, or it may be automatically stopped by providing any suitable operative connection, as the rod 105, between the latch and the appropriate moving portion of the machine or apparatus with which the device is to be employed. This operative connection for withdrawing the latch at a suitable time may be readily varied in form and arrangement to suit the circumstances or particular cases in many Ways that Will suggest themselves to any mechanic.

The alarm device may by a suitable passage in the casing connecting the duct 100 With the inlet 85 When the valve is in its closed position shown in Fig. 4L be operated directly by the pressure-supply; but for most purposes the exhaust-pressure will be found sufiicient and is preferable in such cases, for the reason that the noise of the alarm then ceases after it has served its purpose.

It Will be obvious to those skilled in the mechanics arts that many other modifications may be made in these devices to adapt them to particular purposes or to various environments.

I claim as my invention- 1. The combination of a stop-valve communicating with an alarm by its closing movement, a latch for holding the valve in open position, and means restrained by the latch and tending to close the valve when the latch is withdrawn.

2. The combination of a stopvalve, an alarm, and means for connecting the valve and the alarm, for operating the alarm, upon the closing of the valve.

3. In combination with liuid-pressure-operated devices, a stop-valve therefor operable by the pressure-supply to stop the passage of the pressure, and provided with a port for permitting the passage of the pressure at one position of the valve, and means for latching the valve in that position.

4. In combination With iiuid-pressure-operated devices, a stop-valve therefor connected With the pressure-supply and operable thereby to stop the passage of the pressure, and provided With a port for permitting the passage of the pressure at one position of the valve, means for latching the valve in that position,

and means for unlatching the valve by the operated devices.

5. In combination With fluid-pressure-operated devices, a stop-valve therefor located in the pressure-supply pipe, and movable by the pressure to stop the supply, the valve being provided With a port for permitting the passage of the pressure at one position of the valve, and means for latching the valve in that position against the pressure.

6. A stop-valve for iuid-pressure-operated devices, comprising an inlet and an outlet for the pressure, a reciprocating valve operable by the pressure extending into the pressureinlet and provided with a port communicating With the pressure-inlet in one position of the valve, and a latch for holding the valve in that position against the pressure.

7. In combination With a stop-valve for fiuid-pressure-operated devices, a pressureoperated alarm, and a passage leading from the valve When in its closed position, for directing the pressure to the alarm.

S. In combination with a stop-valve for fluid-pressure-operated devices, a pressureoperated alarm, and a passage leading from the valve when in its closed position for directing the exhaust-pressure to the alarm.

9. In combination With uid-pressure-operated devices, a pressure-operated alarmltherefor, and a stop-valve for shutting o the pressure-supply from the said devices, and for directing the return pressure or exhaust therefrom to the alarm.

10. In combination With fluid-pressure-operated devices, a stop-valve and alarm therefor, comprising a casing having an inlet and an outlet for the pressure, a' reciprocating valve located in the pressure-inlet and provided with a port communicating With the pressure-outlet at the open position of the valve, and provided with a passage leading from the pressure-outlet to an alarm device at the closed position of the valve.

1l. In combination with fluid-pressure-operated devices, a stop-valve and alarm therefor, comprising a casing having an inlet and an outlet for the pressure, a Valve located in the pressure-inlet, provided With a port for the passage of the pressure at the open position of the valve, and provided With a passage leading from the outlet at the closed position of the valve, to the alarm device, and a latch for holding the valve in its open position against the pressure.

l2. In combination with fluid-pressure-operated devices, a stop-valve and alarm therefor, comprising a casing having an inlet and an outlet for the pressure, a reciprocating valve located in the pressure-inlet, provided With a port for permitting the passage of the pressure at one position of the valve, and provided With an exhaust-passage leading from the outlet to a reed or Whistle of the alarm, at another position of the valve.

13. In combination with Iiuid-pressure-operated devices, an automatic stop-valve there- IOO IOS

IIO

for, comprising a casing having an inlet and termined pointin the operation of the said de- 1o an outlet for the pressure, a reciprocating vices.

valve extending into the pressure-inlet and Signed at Hartford, Connecticut, this 19th provided with a port communicating with the day of October, 1901. pressure-outlet in one position of the valve,

a latch for holding the valve in that position B' M' W HANSON' against the pressure,and means operable with Witnesses:

the said devices, for disconnecting the latch H. E. BAILEY, and permitting the valve to close at a prede- WM. H. HONISS. 

